Filter-cell.



G. M. KNEUPER.

FILTER CELL.

APPLICATION FILED JULY 31. I913.

Patented July 27, 1915.

FILTER-CELL.

Specification of Letters Patent.

Application filed. July 31, 1913. Serial No. 782,206.

To all whom it may concern Be it known that T, GEORGE M. Knnnrnn, a citizen of the United States, and a resident of the borough of Brooklyn, county of Kings, city and State of New York, have invented certain new and useful Improvements in Filter-Cells, of which the following is a specification.

My invention relates to filter cells and has for its object to so construct a filtering cell that its filtering material will retain its efficiency for a long time, may be renewed readily when required, and will stand a very high pressure.

"Another object of my invention is to pro- I vide a very strong and durable filter cell having special devices for insuring a tight joint of the cell when placed in a filter.

The invention will be fully described hereinafter, and the features of novelty pointed out in the appended claims.

Reference is to be had to the accompanying drawings, in which Figure 1 is an elevation of my improved filter cell, with parts broken away; Fig. 2 is a central vertical section showing the cell within a filter; Fig. 3 is a horizontal section on line 3-3 of Fig. 2; and Fig. at is a perspective view of one of therubber washers useld in conjunction with my improved filter cel The cell comprises an apertured core composed of a number of spaced longitudinal bars A connected by rings B. Around this core ll place or wrap the filtering material 0, preferably a sheet of fibrous material in two or more layers. The top and bottom edges of the filtering material are about flush-with the ends of the core. At each end I employ a rubber washer 10 having a transverse portion D end faces of the core, as shown in Fig. 2, the outer cylindrical portion of the washer surrounding the edge portions of the filtering material C. A wire or other clamping device E is applied to each of the washers D preferably immediately above the lower end ring 18 and below the upper end ring B, to

. force the washer l) and the filtering material C tightly against the core. Around the filtering material C is placed an elastic pervious sleeve F, preferably consisting of a band or strip of elastic webbing or other suitable pervious' material wound helically around the filtering layer C, the ends of said band being secured in any suitable manner.

adapted to extend inwardly over the Thus in Fig. 1 the upper end of the band Patented July at, rails.

is shown secured temporarily by means of a I pin F (which is removed later on), while the permanent fastening is obtained by placing the ends of the band between the filtering layer 0 and the respective washers D, so as to hold the band by the clamping action of the wire E. The elastic sleeve F is surrounded, with an intervening space, by a perforated cylinder or jacket G made of sheet metal. The preferred way of holding this cylinder in place consists in forming it with outwardly doubled edges G over which is slipped a longitudinal connecting strip H having inwardly bent edges and made of sheet metal or other suitable material. The strip H extends the full lenth of the jacket G, and the washers D project beyond the ends of the jacket.

The filter-cell constructed as described above, is used in connection with any suitable filter. In the example shown, the cell is clamped between the bottom J and the cover J 2 of a filter J to which the water or other liquid to be filtered is supplied throu h a central perforated pipe K, while the Eltered liquid passes out through a faucet L.

will contract at once and again press the filtering layer G firmly against the core. This inward or contractile movement of the filtering layer will greatly assist in dislodging from the inner surface of said layer, any deposit that may have been formed thereon, and this feature will considerably lengthen the useful life of the filtering material. Should the liquid be supplied at a pressure temporarily exceeding that for which the elastic sleeve F is designed, such sleeve will be relieved of excessive strain by contact with the surrounding cylinder G. While not absolutely rigid, this cylinder is of course much more resistant than the'elastic sleeve F.

One of the principal advantages of the elastic band F is that thereby the filtering core, and the soiled surface being thus held in rigid position can be cleaned readily and efficiently by means of a spray of water or brush without danger of injury.

The filtering material 0 being put on in layers, which in course of time or use wear away, the following layers, due to the elastic or contractile qualities of the band F, are again pressed against the core and thus keep the cell in perfect working order until the last layer is worn away. Moreover, this contractile tendency prevents the cell from absorbing water in a very great measure, which facilitates its drying out completely when not in use, whereby its capillarity is quickly restored. The elasticity thus given the cell has the further advantage of absorbing the shock or water hammer, which shock impairs the efliciency of filters generally.

Various modifications may be made without departing from the nature of my invention as set forth in the appended claims.

I claim:

1. A filtering cell comprising an apertured core, a layer of filtering material surrounding said core, a pervious elastic sleeve surrounding the filtering material, and a relatively rigid, jacket surrounding said sleeve.

2. A filtering cell comprising an apertured core, a layer of filtering material surrounding said core, a pervious elastic sleeve surrounding the filtering material, a split jacket surrounding the sleeve, and means for connecting the edges of said jacket.

3. A filtering cell comprising an apertured core, a layer of filtering material surrounding said core, a pervious elastic sleeve surrounding the filtering material, a split perforated jacket surrounding the sleeve and having outwardly doubled edges, and a connecting strip engaging said edges.

4. A filtering cell comprising an apertured core, a layer of filtering material surrounding said core, and a sleeve formed by a strip of pervious elastic material surrounding said filtering material helically.

5. A filtering cell comprising an apertured core, a layer of filtering material surrounding said core, and a sleeve of elastic textile material surrounding said filtering material.

6. A filtering cell comprising an apertured core, a layer of filtering material surrounding said core, washers extending over the ends of the core and surrounding the adjacent portions of the filtering material, and means for clamping the Washers and filtering layer against the core.

7. A filtering cell comprising an apertured core provided with rings at its ends, a layer of filtering material surrounding said core, washers extending over the ends of the core and surrounding the adjacent portions of the filtering material, and clamping devices surrounding said washers approximately at the inner edges of said end rings.

8. A filtering cell comprising an apertured core, a layer of filtering material surrounding said core, and washers extending over the ends of the, core and surrounding the adjacent portions of the filtering material.

GEORGE M. KNEUPER.

-Witnesses:

JOHN LorKA, CHARLES MATHE. 

